perf: fix perfhelper-pathcopies without --stats

Some conditional were missing.

contrib/perf.py

@@ -1814,6 +1814,7 b' def perfhelperpathcopies(ui, repo, revs='
                     b'nbrevs': len(repo.revs('%d::%d', b, p)),
                     b'nbmissingfiles': len(missing),
                 }
+                if dostats:
                 alldata['nbrevs'].append((
                     data['nbrevs'],
                     base.hex(),
@@ -1831,6 +1832,7 b' def perfhelperpathcopies(ui, repo, revs='
                     # not very stable timing since we did only one run
                     data['time'] = end - begin
                     data['nbrenamedfiles'] = len(renames)
+                    if dostats:
                     alldata['time'].append((
                         data['time'],
                         base.hex(),